Many different branches in the world of professional piloting. From airline pilots, to banner flying, pipeline surveys, firefighting, corporate flying, part 91 flying(basically being paid to fly someone's personally owned plane), agricultural "cropdusting", land surveys, search & rescue, the list goes on and on.
I'm not yet a paid pilot myself, still finishing up my commercial license. But from what I understand they all have their ups and downs.
Airlines - you can make good money after a few years of service, but that's after lots of training and years of demanding schedules for less-than-spectacular pay.
Banner flying, sightseeing, etc - Can be decent money (often plus tips), but these jobs are most often temporary, part time, and seasonal
Ag flying - also very demanding as time is money, as well as the skill level required to maneuver the aircraft safely at very low altitudes
Charter or Part 91 - Hard to put a pin in any specifics for this one. Schedules can be demanding and/or unpredictable depending on how often your client(s) need to fly and where they are flying to. Really just boils down to the requirements of each specific job
Then there's always flight instructing. The majority of pilots pick up their CFI/CFII certificate and instruct for a while to build up hours and get more competitive in the aviation job market. Many also do scenic and/or charter flights, often for the same company they are instructing for.
Not sure how helpful all of that is, but it kept me occupied and at least bumped your thread lol. Lots of info can also be found via the search function.
Good luck!